Carpenter&#39;s square.



No. 817,515. PATENTED APR. 10, 1906. D. PDLIMENI. CARPENTBRS SQUARE.

APPLIATION FILED DEO.2S.1905.

WTNEssEs. A TMENTOR1 DoMNc-.K PcLMEN- A TTOFN'EYS DOMENICK POLIMENI, OFI/VINDBFJR, PENNSYLVANIA.

ARPENTERS SQUARE.

Specification of Letters Patent.

Patented April 10, 1906.

Application nea December 28,1905. swarm. 293,648.

T0 all whom, t may concern:

Be it known that I, DoMENrcK POLIMENI, a citizen of the United States ofAmerica, residing at Windber, in the county of Somerset and State ofPennsylvania, have invented certain new and useful Improvements inCarpenters Squares, of which the following is a specification, referencebeing had therein to the accompanying drawings.

. This invention relates to certain new and useful improvements incarpenters squares; and the primary object of the invention is toprovide a carpenters square with a plurality of level-glasses, therebyincreasing the general usefulness of the square and combining the squareand level into an inexpensive article which can be easily manipulated asa square or as a level. To this end I use two ordinary carpenterssquares and mount them together, whereby they coincide with one another.Between the squares I arrange a plurality of level-glasses fordetermining vertical planes and horizontal planes. In connection withthe square I have devised novel means, such as slidable casings ,forprotecting the level-glasses, while the square is used in the ordinarymanner; but should it be desired to use one of the levels it is onlynecessary to move the casing covering said glass in order to render thesame visible.

The detail construction of my improved combined level and square will behereinafter more fully described and claimed, and, referring to thedrawings accompanying this application, like numerals of referencedesig- V nate corresponding parts throughout the several views, inwhichc Figure I is a side elevation of a square constructed inaccordance with my invention. Fig. 2 is an edge view of the same. Fig. 3is a detail sectional view of a portion of the square. Fig. lis a sideelevation of a portion of the square, one of the side plates beingremoved.. Fig. 5 is an edge view of the same.

To put my invention into practice, I construct my improved instrument orarticle of two side plates I 1, these plates conforming substantially tothe ordinary carpenters square, having graduations 2. Strips of wood 3are mounted between the side plates 1 1, and the strips of wood,together with the side plates, are secured together by a plurality ofscrews or rivets 4, whereby a carpenters square will be provided of agreater thickness than the ordinary type of square used.

The edges of the side plates 1 l are cut away, as at 5, also the woodenstrips?) adjacent to the cutaway portions of the side plates. `In thecut-away portions of the strips 3 I mount level-glasses 6, these glassesbeing of a conventional form and are preferably held in the cut-awayportions of the wooden strips by cement or the like adhesive material 7.The level-glasses 6 are mounted in the square in parallel alinement withthe adjacent edges of said square and are employed for determininghorizontal planes.

The wooden strips 3, interposed between the side plates 1 l, have theiredges bound by metallic strips 8, which are interposed between the edgesof the side plates l 1. The strips 8, adjacent to each level-glass, areslotted, as at 9, and slidably mounted beneath said strips is a casing10, carrying a button 11. The casings are adapted to slide back andforth over the level-glasses, and the button of each casing is adaptedto'protrude into slots 9, whereby the casing can be easily and quicklymanipulated to expose or inclose the level-glass. The casings I0 areadapted to slide back and forth upon the strip of wood adjacent to eachlevel-glass, as clearly illustrated in Figs.l 4 and 5 of the drawings,and these casings are adapted to protect the levelglasses when, theinstrument is being used simply as a square.

To determine a vertical plane, I provide the longer arm 12 of the squarewith two diametrically opposed openings I4 14, and transversely of saidopenings between the side plates 1 l is mounted a level-glass I5, thewooden strips 3 being cut away to accommodate the level-glass, which issecured in position by cement I6, similar to the glasses 6, heretoforedescribed. A casing 17 is also used in connection with the level-glassl5 to protect the same, said casing sliding between the side 4plates l 1of the square and being manipulated through slots 18 I8, formed in theside plates l l.

I do not care to confine myself specifically to the use of wooden stripsbetween the side plates 1 1, as other material may be readily used toserve the same purpose, and in mounting the level-glasses between theside plates plaster-of-paris or the like material, which is not affectedby atmos heric conditions, may be used, it being preferable to use amaterial around the level-glasses which will not expand or contract. Inthis manner the accuracy of my improved combined level and IOO IOS

square will be assured and a strong and durable construction provided,which will withi stand the rough usage to which instruments of thischaracter are generally subjected.

From the foregoing it will be observed that I have devised a novelcombined square, level, and plumb which can be used by carpenters,stone-masons, and stone-cutters.

Such changes in the minor details of coni struction and size andproportion as are perl missible by the appended claims may be resortedto without departing from the spirit l and scope of the invention.

What I claim, and desire to secure by Leti ters Patent, is l l. Aninstrument of the type described l embodying two parallel platesconforming to f carpenters squares, said plates having their edges cutaway, level-glasses mounted between said plates adjacent to the cut-awayl portions thereof, casings slidably mounted between ,said plates andadapted to inclose f said level-glasses, means to secure said plates ltogether, and means to retain said level-,l glasses between said plates,substantially as l described. I 2. A n instrument of the type describedembodying two carpenters squares secured together side by side, saidsquares being cut squares adjacent to the cut-away portions of saidsquares, casings mountedl between said squares and adapted to slide oversaid levelglasses, means to move said casings, means to support saidglasses between said squares, substantially as described 3. Aninstrument of the type described embodying two parallel metalliccarpenters squares, wooden strips arranged between said squares,level-glasses mounted between said squares, means to support saidglasses in said strips, means to secure said squares and said stripstogether, and means carried by said strips to shield said glasses,substantially as described.

4. An instrument of the type described embodying two carpenters squaressecured together side by side, glasses mounted be tween said squares,and movable-means carried by the instrument to shield said glasses,substantially as described.

In testimony whereof I aflix my signature in the presence of twowitnesses.

DOMENICK POLIMEN I.

Witnesses J. T. STRINGER, WM. F. Joyns.v

l away,'levelglasses mountedv between said 3cr

